Sachin is younger than Rakesh by 4 years. If their ages are in the respective ratio of 7 : 9, then the age of Sachin is

Sachin is younger than Rakesh by 4 years

Let Rakesh age be $=x-4$

Ratio of their age$=7:9$

$\frac{x-4}{x}=\frac{7}{9}$

$7x=9x-36$

$36=2x$

$x=18$ years(Rakesh)

Sachin’s age$=x-4$

$=18-4$

$=14 years$